vhost: introduce guest IOVA to backend VA helper

[dpdk.git] / lib / librte_vhost / vhost.c

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 2493a79..6e55116 100644 (file)
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -47,12 +47,37 @@
 #include <rte_memory.h>
 #include <rte_malloc.h>
 #include <rte_vhost.h>
+#include <rte_rwlock.h>
 
 #include "iotlb.h"
 #include "vhost.h"
+#include "vhost_user.h"
 
 struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
 
+uint64_t
+__vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
+                   uint64_t iova, uint64_t size, uint8_t perm)
+{
+       uint64_t vva, tmp_size;
+
+       if (unlikely(!size))
+               return 0;
+
+       tmp_size = size;
+
+       vva = vhost_user_iotlb_cache_find(vq, iova, &tmp_size, perm);
+       if (tmp_size == size)
+               return vva;
+
+       if (!vhost_user_iotlb_pending_miss(vq, iova + tmp_size, perm)) {
+               vhost_user_iotlb_pending_insert(vq, iova + tmp_size, perm);
+               vhost_user_iotlb_miss(dev, iova + tmp_size, perm);
+       }
+
+       return 0;
+}
+
 struct virtio_net *
 get_device(int vid)
 {